• Science Experiments
    119 replies, posted
I soaked a chunk of styrofoam in a bowel of gasoline, stuck a stick in it, let it dry, and lit it, lasted a long ass time. My friend made a rocket once, but when he set it off, it blew up in his face :doh:
[QUOTE=Yahnich;27480639]Alpha radiation actually has most energy of all the types of radiation because it's basically a massive helium atom charging towards shit. And the more mass something has, the more kinetic energy.[/QUOTE] Yeah, but it also depends on the square of the speed. And beta particles go a lot faster than alpha particles (up to 90% the speed of light). Then again, they are like almost 2000 times less massive than alphas.
Alpha- most ionising (Does the most damage), least penetrating Beta- medium penetration and Ionisation Gamma- Most penetrating (Even the lead in a Geiger counter has trouble stopping it), least Ionising. Pay attention in physics kids.
I recently succeeded in mixing two ingredients in a cup, without destroying anything. I just nearly dropped the cup before I started. Me mixing ingredients: [media]http://www.youtube.com/watch?v=fzC8Bg9MtXA[/media] Wait, what? [editline]17th January 2011[/editline] [QUOTE=Mort and Charon;27481942]Alpha- most ionising (Does the most damage), least penetrating Beta- medium penetration and Ionisation Gamma- Most penetrating (Even the lead in a Geiger counter has trouble stopping it), least Ionising. Pay attention in physics kids.[/QUOTE] Better explained Alpha -Most energy made (cant hurt a shit as a sheet of paper can stop it, and it cant go any further down in your skin(okay as long as it isn't inside you) Beta -a bit less energy per particle (Can go through clothes and further into the skin. You may get hurt) Gamma -Radiation level critical, but even less energy per particle. (goes through everything, damages DNA. [b]Can be stopped by many centimeters of Lead or some meters with concrete[/b] Also, Gamma is Electromagnetic Ok, I just searched, and I admit that I was wrong. Its fixed now. (Edited) It ain't really
Here's a neat little reaction you can do at home: step 1: make a small mound (or big of you are so inclined) of potassium permanganate on a heat-proof, burn proof surface Step 2: make sure there aren't any flammable materials around step 3: pour a small pit of glycerin onto the mound step 4: stand back step 5: lots of extremely hot fire! Tip: you can use reaction as a messy way to melt glass and start thermite reactions.
[QUOTE=catfishyfish;27482172] Better explained Alpha -Most energy made (cant hurt a shit as a sheet of paper can stop it, and it cant go any further down in your skin(okay as long as it isn't inside you) Beta -a bit less energy per particle (Can go through clothes and further into the skin. You may get hurt) Gamma -Radiation level critical, but even less energy per particle. (goes through everything, damages DNA. [b]Can be stopped by many centimeters of Lead or some meters with concrete[/b] Also, Gamma is Electromagnetic Ok, I just searched, and I admit that I was wrong. Its fixed now. (Edited)[/QUOTE] Ok, you've still got that wrong, you're saying Gamma is Electromagnetic, but if you know this you'll know it's a wave, and yet you talk about particles. And your's adds nothing to my explanation (which was purposely in layman's terms). And for people interested in doing what nerdrage said, you should be able to get Potassium Permanganate from some kind of Vet supplies website.
Why are gamma rays electromagnetic and alpha not?
[QUOTE=Mort and Charon;27495506]Ok, you've still got that wrong, you're saying Gamma is Electromagnetic, but if you know this you'll know it's a wave, and yet you talk about particles. And your's adds nothing to my explanation (which was purposely in layman's terms). And for people interested in doing what nerdrage said, you should be able to get Potassium Permanganate from some kind of Vet supplies website.[/QUOTE] Wave-particle duality. The higher in frequency an electromagnetic wave gets, the more it begins to behave like a particle. Radiowaves, as an example, display VERY LITTLE (if ANY) particle like properties. Conversely x-rays and gamma rays exhibit a fair few particle like properties. [editline]18th January 2011[/editline] [QUOTE=Number-41;27496642]Why are gamma rays electromagnetic and alpha not?[/QUOTE] Gamma rays are electromagnetic radiation. An oscillating electromagnetic field. Alpha and beta radiation aren't electromagnetic radiation. They're actual particles. An alpha particle is a helium nuclei (two protons, two neutrons). A beta particle is an electron.
Isn't an electron also a wave?
[QUOTE=Number-41;27496978]Isn't an electron also a wave?[/QUOTE] If you wanna be [b]really[/b] technical: yes [b]and[/b] no. It exhibits wave-particle duality (as does EVERYTHING more or less). But if you DON'T wanna be really technical: then no. It's just a particle.
I mean is it in in the electromagnetic spectrum or not?
[QUOTE=Number-41;27497127]I mean is it in in the electromagnetic spectrum or not?[/QUOTE] No :confused: Electrons are the negatively charged particles which 'orbit' (really they surround it in a 'cloud of probability', but that's besides the point) the nuclei of atoms.
Hmm I guess I'm just confusing things. I thought they're kinda like the same thing (Bohr's 2nd postulate)
[img]http://www.antonine-education.co.uk/physics_gcse/Unit_1/Topic_5/em_spectrum.jpg[/img] Photon is the particle of [B]all[/B] electromagnetic radiation. [editline]18th January 2011[/editline] [quote]In 1924, Louis-Victor de Broglie formulated the de Broglie hypothesis, claiming that all matter, not just light, has a wave-like nature; he related wavelength (denoted as λ), and momentum (denoted as p): [img]http://upload.wikimedia.org/math/4/b/b/4bb8c7e59b4085b09e450d174e331445.png[/img][/quote] You can use De Broglie's wavelength equation to calculate the wavelength for an electron. Or any particle for that matter. But as you can see ([I]h[/I] being Planck's constant. A really really small number), the larger the momentum p is, the smaller the wavelength λ is (they're inversely related). This means that the heavier particle (they've done it to molecules too) you want to show wave-properties, the slower it has to go, because we need a small momentum p to attain a big enough wavelenght λ to show those wave-properties.
Ok now this is just turning into a physics discussion. Got my Physics 2 module tomorrow as well.
Well that was nifty
[QUOTE=Block;27498757][img_thumb]http://www.antonine-education.co.uk/physics_gcse/Unit_1/Topic_5/em_spectrum.jpg[/img_thumb] Photon is the particle of [B]all[/B] electromagnetic radiation. [editline]18th January 2011[/editline] You can use De Broglie's wavelength equation to calculate the wavelength for an electron. Or any particle for that matter. But as you can see ([I]h[/I] being Planck's constant. A really really small number), the larger the momentum p is, the smaller the wavelength λ is (they're inversely related). This means that the heavier particle (they've done it to molecules too) you want to show wave-properties, the slower it has to go, because we need a small momentum p to attain a big enough wavelenght λ to show those wave-properties.[/QUOTE] So does that mean that the double slit-experiment doesn't just work for electrons but also for other particles?
[QUOTE=Number-41;27500085]So does that mean that the double slit-experiment doesn't just work for electrons but also for other particles?[/QUOTE] Yes, there is a youtube video of it being done with a microwave on youtube if you dont believe it.
[img]http://www.smbc-comics.com/comics/20101217.gif[/img] I laughed until I cried. If I were a character from that comic: I'd be BOTH the dad, and the little kid.
[QUOTE=deathdealer2009;27500006]Well that was nifty[/QUOTE] Problem is all of this was in Physics module 1.
[QUOTE=Konakona940;27462236]Something I did one time I was observing some chemists at the local uni is that they where testing the oxidising ability of Dioxygen difluoride. BTW do not do this at home, I only took a very small part in this because I'm not a chemist just an aspiring to read Pharmacy/Pharmacology at uni one day. So we passed fluorine and oxygen through a tube heated at around 500K and then they tested it on a few substances. T'was all very fun to watch! A good thing to read about this substance is here: [url]http://pipeline.corante.com/archives/2010/02/23/things_i_wont_work_with_dioxygen_difluoride.php[/url][/QUOTE] How do you want to get F2 at home anyway? It is incredibly hard to synthesize to begin with, something you can't do at home. [editline]18th January 2011[/editline] [QUOTE=Number-41;27496978]Isn't an electron also a wave?[/QUOTE] Any body behaves as a wave, even a living being, it's just that the actual wave is smaller than the size of an atom in say a human being.
[QUOTE=Block;27498757][img_thumb]http://www.antonine-education.co.uk/physics_gcse/Unit_1/Topic_5/em_spectrum.jpg[/img_thumb] Photon is the particle of [B]all[/B] electromagnetic radiation. [editline]18th January 2011[/editline] You can use De Broglie's wavelength equation to calculate the wavelength for an electron. Or any particle for that matter. But as you can see ([I]h[/I] being Planck's constant. A really really small number), the larger the momentum p is, the smaller the wavelength λ is (they're inversely related). This means that the heavier particle (they've done it to molecules too) you want to show wave-properties, the slower it has to go, because we need a small momentum p to attain a big enough wavelenght λ to show those wave-properties.[/QUOTE] [media]http://www.youtube.com/watch?v=bjOGNVH3D4Y[/media] My Physics teacher wants my class to learn it off by heart. What. The FUCK.
Magnesium+Spark+Teachers Front Porch=Huge Ass Magnesium Fire+Water=Even worse :P
[QUOTE=Mort and Charon;27495506]Ok, you've still got that wrong, you're saying Gamma is Electromagnetic, but if you know this you'll know it's a wave, and yet you talk about particles. And your's adds nothing to my explanation (which was purposely in layman's terms). And for people interested in doing what nerdrage said, you should be able to get Potassium Permanganate from some kind of Vet supplies website.[/QUOTE] Haha. Okay, next time someone says something about radioactive stuffs, Ill just shut up.
so recently i did some ~SCIENCE~ my group and i treated a number of polymer surfaces using a low pressure air plasma maintained by 13mhz RF. here's our plasma reactor [img_thumb]http://mikeh269.com/plasma/plasmareactor.jpg[/img_thumb] once sealed inside the reactor we pumped it down to a pressure of about 0.1 mbar then fired up the RF generator [img_thumb]http://mikeh269.com/plasma/plasmareactoron.jpg[/img_thumb] after that we analysed the surface free energy of the polymer using the [url=http://en.wikipedia.org/wiki/Goniometer#Surface_science]sessile drop method[/url] (zisman plot) [img_thumb]http://mikeh269.com/plasma/best%20droplet.jpg[/img_thumb] and analysed the surfaces using peel testing methods and [url=http://en.wikipedia.org/wiki/X-ray_photoelectron_spectroscopy]x-ray photoelectron spectroscopy[/url]. yay!
[QUOTE=QueenElizebeth;23178636]Here's a safe one that you can perform with a group of friends around you or in the kitchen at home with your mother. 1. Get a bottle 2. Fill with milk 3. Put in some chlorine 4. Close bottle 5. Shake 6. Put near your face 7. Wait 8. Observe spectacular mixture show amazing colours and beautiful textures![/QUOTE] A friend of mine has huge scars inbetween his thumb and index on both his hands because a bottle blew up in his hands while he was holding it when he was like 12.
Um, I once made a magnet gun for a science fair in school. I was able to shoot a small metal pellet with such velocity it shot to the other end of the gym.
Zinc + ammonium nitrate + salt + water + bored suburbanites with nothing better to do = [MEDIA]http://www.youtube.com/watch?v=WqjoPtlFyPc[/MEDIA] Fun fact, the humidity outside where we were making the stuff caused it to ignite in my hand once. P. scary bro.
I made a volcano once. :downs: [img]http://amars-world.com/wp-content/uploads/2010/11/erupting-volcano-project.jpg[/img]
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